package util;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentSkipListMap;

public class MapTest {

    public static void main(String[] args) {
        MapTest mapTest = new MapTest();
        mapTest.hashMapTest();
        ConcurrentSkipListMap skipListMap = new ConcurrentSkipListMap();

    }

    public void hashMapTest(){
        Map<String,Object> map = new HashMap<String,Object>();
        map.put("1", "1");
        map.put("2", "2");
        map.put("3", "3");
        map.put("4", "4");
        System.out.println(11);
    }

}
